No report available

Objective: Instigate research into application strategies for Pix on cotton in Australia and compare results with similar experiments from California. Of particular interest was the recent discovery that multiple applications of Pix gave superior yield results compared with a single application.

In the last year I requested funds for partial support towards a conference trip in the USA, together with a visit to the principal laboratory in the USA investigating tillage and compaction. After I made this application, I received a further invitation to undertake some work in West Germany with Professor Rainer Horn, a leading worker in the field of compaction. This work in West Germany was not supported by the Cotton Research Council, nor was it directly concerned with cotton soils. Nevertheless, the work that we undertook on compaction is of direct relevance to my work on the cotton soils, so I shall report on this visit also.

Dr Daly Travel Australian Cotton Conference

The main aim of this trip was to report to the international scientific community on the progress of the Insecticide Resistance Management Strategy that has been implemented in Australia to contain pyrethroid and endosulfan resistance. With this aim in mind, a paper was delivered on the "Field Selection for Pyrethroid Resistance Genes in Heliothis armigera in Australia". This paper discussed the importance of the mixed function oxidase gene for field resistance to pyrethroids in Australia.

The objectives of this study were: (i) To study the population dynamics of Heliothis on the Darling Downs and to quantify the significance of the major controlling influences (predators, parasites pathogens, weather and host plant quality) on population changes within the species, and, (ii) To assess the potential for an area-wide management approach to the suppression of Heliothis populations through the identification of ecological bottlenecks and the practical manipulation of the controlling factors.

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This project utilises information from Emerald and other irrigation districts in the State to develop a scheduling system, WATERSCHED, as part of a Cotton Management Decision Program. OBJECTIVES 1. To determine cotton yield response functions to differing levels of irrigation water and nutrients, to enable farmers to make better decisions on use of those input resources. 2. To develop a Cotton Management Decision Program which provides commercially relevant options of water scheduling and fertiliser application for extension officers, consultants and cotton growers, to optimise crop profitability. To increase the adoption by farmers of beneficial water management and fertiliser practices.

The objective of this project was to evaluate preliminary and advanced breeding selections from the Narrabri and Biloela programs at up to five locations in Queensland. Over the period 1986/87 to 1988/89 this project played a vital role in selecting new cotton varieties for commercial production. Hundreds of lines from the Biloela and Narrabri breeding programs were evaluated in preliminary trials at Emerald, Biloela and Brookstead, while advanced material was tested in the Australian Cotton Cultivar Trials at these sites plus Theodore.